Filter cartridge



FIG. 1 is a top plan view of a filter cartridge showing our new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a bottom plan view thereof; and

FIG. 4 is a cross-sectional view taken along the line 4--4 of FIG. 3.

The ornamental design for a filter cartridge, as shown and described.